Thanks Sean for the explanation, but there is still something i don't understand.
Question#1:
On the microcontroller side: How can i send the results of a 12 bits A2d Signal from the microcontroller to visual basic.net since USBBufferout is defined as a byte.
Question#2
on the Visual basic.net side when your ready to send data back to the controller:
do you just include all the 64 bufferout bufferout(1) bufferout(2)....bufferout(63)
HidWriteEx, VendorId, ProductID, BufferOut(0), BufferOut(1)....BufferOut(63)
Or is there a shorter way to do it.

Thanks Sean